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In August, Kuhn won the Republican primary in the race for Marion County Sheriff. Kuhn's name is still on the ballot, but sources say Kuhn will pull out of the race.

Dean's statement called for Kuhn to withdraw.

"In view of the resignation of Dan Kuhn from the very office he seeks to be elected, coupled with admission of the extramarital affair which is at the center of the very serious pending allegations, I believe it would be impossible for Dan Kuhn to effectively lead the Sheriff's Office in accordance with its established core values. Therefore, I am calling for Dan Kuhn to do the right thing and immediately withdraw as a candidate in the Sheriff's election," the statement said.

Kuhn's accused affair was with the principal of a private school where his wife used to teach.

The woman has hired an attorney and filed a formal complaint saying that Kuhn used sheriff department vehicles, gas and time to conduct the affair.

In a brief interview Wednesday, Kuhn said, "I've already admitted that I had an affair, and with an independent investigation going on, it would be inappropriate for me to comment at this time."